01:198:170 Study Guide - Final Guide: Asteroid Family, Ampersand

• School: Rutgers University
• Department: Computer Science
• Course: 01:198:170
• Professor: All

Document Summary

Magnetized pieces of metal that have positive or negative charge, positive or negative = 1 or a 0. Reflective foil, if there is a divot on the surface of cd the laser reads it as a 1 or a 0. Holes in punch cards correspond to a presence or an absence, a 1 or 0. No one links to the page so a spider/crawler cannot find it. All images, search engine cannot read what"s on that page. Content cannot be read (for example, pdf"s were unreadable 10 years ago) *you do not need to know three levels of software. Invisible web (reasons why a web page would be invisible to a search engine) Know how to make lists, use colspan and rowspan. Type attribute to make list have bullet points. First thing crawler does when it visits your page is looks at all the links. Adds links it has not visited to a to-do list.